- #1
PFuser1232
- 479
- 20
I can't get my head around the fact that for the interference of two waves to occur, the two sources producing the waves must be coherent (Well, that's what my A level Physics book says). Wouldn't it perhaps be more appropriate to say that coherence is only a necessary condition if an interference pattern is to be observed? (But not a necessary condition for intereference itself to take place.)